Aircraft



FIG. 1 is a perspective view of an aircraft showing the new design;

FIG. 2 is a second perspective view of the aircraft showing the new design;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a second side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof. 

CLAIM What is claimed is the ornamental design for an aircraft, as shown and described. 